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A kind of electrode swing type liquid conductivity measurement method

A measurement method, swing-type technology, applied in the direction of fluid resistance measurement, etc., can solve problems such as theoretical errors, adverse effects of measurement, and inability to completely eliminate the effects of electrode polarization

Active Publication Date: 2017-05-31
FUJIAN NORMAL UNIV
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Problems solved by technology

However, the electrodes placed in the solution will be polarized after being energized, so that the measured voltage U is not actually the voltage at both ends of the solution itself, but the voltage applied to the two virtual electronic devices of the solution resistance series electrode polarization equivalent capacitance Voltage, so there is a theoretical error in the formula R=U / I; in order to reduce the influence of electrode polarization on the measurement accuracy, the common method is to apply positive and negative polarity symmetrical alternating current such as sine waves on the electrodes for excitation, but AC excitation The method can only reduce the influence of electrode polarization, but cannot completely eliminate the influence of electrode polarization, and AC excitation will introduce the adverse effects of electrode inter-electrode capacitance and electrode lead capacitance on measurement

Method used

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  • A kind of electrode swing type liquid conductivity measurement method
  • A kind of electrode swing type liquid conductivity measurement method

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Embodiment Construction

[0009] Below in conjunction with accompanying drawing, the technical scheme of the present application is further described:

[0010] figure 1 with 2 Among them, 1 and 2 represent the two electrode ends of the measuring electrode, called the first electrode end 1 and the second electrode end 2, 3 represents the electrode arm, 4 is the swing mechanism, 5 is the electrical connection lead, 6 is the terminal, and the two The two electrode ends, that is, the first electrode end 1 and the second electrode end 2 are flat metal sheets, which are parallel to each other with a gap and face upright. The two electrode ends, that is, the first electrode end 1 and the second electrode end 2 are fixedly installed on the The electrode arm 3 is mechanically connected to the swing mechanism 4 through the electrode arm 3, and the two electrode ends, namely the first electrode end 1 and the second electrode end 2, pass through the inner hollow of the electrode arm 3 and are electrically connect...

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Abstract

The invention discloses an electrode oscillating type liquid conductivity measurement method. A measured liquid rapidly passes through a gap between two electrode tips back and forth by means of an oscillating mechanism to scour surfaces of the two electrode tips, ions cannot be gathered and attached to the surfaces of the measured electrodes, stable double electrode layers cannot be formed, and accordingly, electrode polarization is avoided; and direct voltage easy to implement is adopted for excitation, a test method and a calculating method are simple and reliable, influence of distributed capacitance between electrodes and between electrode leads is not required to be considered, and the anti-interference property is very high.

Description

technical field [0001] The technical proposal relates to a method for measuring liquid conductivity or resistivity, in particular to a method for measuring liquid conductivity or resistivity that can completely eliminate electrode polarization and adopt direct current excitation. Background technique [0002] The measurement of liquid conductivity is widely used in many fields such as industrial production and water quality monitoring. The basic measurement method of solution conductivity is to measure the voltage U applied to the two ends of the electrode placed in the solution and the current I flowing through the electrode, and calculate the resistance between the electrodes R=U / I, calculated by G=K / R The conductivity of the solution, where K is the cell constant. However, the electrodes placed in the solution will be polarized after being energized, so that the measured voltage U is not actually the voltage at both ends of the solution itself, but the voltage applied to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/22
Inventor 廖晓东陈顺凡石兆英
Owner FUJIAN NORMAL UNIV
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